Every time NPR runs another story about Twitter, AK and I roll our eyes. At best, these stories are about how, say, Iranian students are organizing protests via Twitter. At worst, some old reporter caps his interview with some old rock star by asking, “Do you Tweet?” To which Old Rock Star either says, “Good lord, no” or, with a bit of ironic distance, “Yeah, all the kids are doing it,” and I guess we’re supposed to squeal at the adorable, hilarious mental picture of Old Rock Start pecking away at his 140 characters. As far as I can tell, Twitter exists for the purpose of 1) marketing, 2) coordinating protests in countries under the thumb of oppressive regimes and 3) making reporters who are over fifty feel like they’re with-it. If you’re not a marketer, protester or reporter, you have no reason to be on Twitter. Even if you do have stuff to market (and, sigh, don’t we all ), you’re only going to be hawking your stuff to people who are there to hawk their stuff. It’s like the garage sa...